Spring bed-bottom



No. 624,34l.` yPavfentd May 2, |899.

F. KARR.

SPRING BED BOTTOM.

(Application led June 29, 1898.)

(No Model.)

Inventor.

` Francis Karr Hy wf 'M7 Attorney.

xs persas co., wnoraunqo.. WASHINGTON, D. c;

UNITED STATES PATENT OFFICEC FRANCIS KARR, OF HOLLAND, MICHIGAN,ASSIGNOR TO BENJAMIN KARR,

' OF CLEVELAND, OHIO.

SPRING BED-BOTTOM.

SPEG'IFICATION forming part of Letters Patent 624,341, dated May 2,1899.

Application filed J une Z9, 1 89 8.

To all whom it may concern:

Be it known that I, FRANCIS-KABE, a citizen of the United States,residing at Holland, in the county of Ottawa and Stateof Michigan, haveinvented certain new and useful Improvements in Spring Bed-Bottoms, ofwhich the following is a specification.

My invention relates to improvements in bed-bottoms constructed with aseries of spiral vertical springs known in the market as single anddouble deck springs; and its objects are, first, to avert the danger ofthe springs leaning or sagging sidewise; second, to prevent the severalcoils of the springs from clashing and making an unpleasant grindingnoise, and, third, to so extend the upper coil of each spring that itwill engage and support the next succeeding spring. I attain theseAobjects by the mechanism illustrated in the accompanying drawings, inwhich- Figure l is a plan of a spring bed-bottom embodying the severalfeatures of my invention. Fig. 2 is an end elevation of the same; andFig. 3 is a plan of a detached spring, showing the manner ofinterlocking the springs.

Similar letters refer to similar parts throughout the several views.

In the accompanying drawings, A represents the top or border of thespring, and A represents the spring.

My invention consists first and primarily of the form and application ofthewishboneshaped braces B. These braces are of a single piece of wirebent at the point b to form a spring, the sides of which diverge to apoint somewhat beyond the longitudinal center, when they again approacheach other slightly to the ends, forming two springs substantially theshape laterally of a Wishbone.. The bow portion at b' is secured to thesurface structure of the springs in the body of the bed-bottom, and theends are secured to the borders of an opposite surface structure, as atZ9', being spread some distance apart, so that any pressure on the topof the springs will cause the curved sides of the braces to diverge atthe centers, as indicated by the dotted lines in Fig. 1, so that theyare continually eective without distorting the bed-bottom, and as someof the braces incline in one direction form the arm a', which passesacross the end and others in an opposite direction and they incline fromevery side of the spring bed-bottom it can be readily seen that theaction of the spiral springs must be vertical andwith no inclination tobend or throw over to the right or the left. This feature is the directresult of the peculiar form of the brace, and as the action of thespringsis thus rendered absolutely vert-ical it is impossible for thecoils of the springs to scrape by each other, and by this means theusual unpleasantv grating noise so common in springs of this class afterthey have been used for a time is wholly averted and the life of thespring is prolonged. I further facilitate the action of these braces bythe peculiar construction and bracing of the spiral springs. Thisfeature of my invention is more fully indicated in Fig. 3 and is asfollows: The knot of the end or face coil ct of a spiral spring isformed by bending back around the second coil a3, forming a loop or bowa4, and its prolonged end projecting thence out to or, face coil of thenext adjacent spring and terminates in a hook a", that passes' under thebeginning of the prolongation of the' arm ct' of the next adjacentspring' and hooks back into its similar knot. By this means I have acontinuous series of ties and locks crosswise of the bed-bottom, whilewith the ordinary tie-rods C, which stand at right angles therewith, Ihave a thorough bracing of the extremities of the springs, aud thebraces B, hereinbefore described, connecting the top coil of one set ofsprings with the bottom coil, substantially, of another set of springs,and extending from the one to the other diagonally, the bedbotton1 is sothoroughly braced that lopping and friction of the spiral springs arewholly prevented.

I prefer that the broad ends of the braces B be carried by and attachedto an end or face coil of a spiral spring, as at b"in Fig. l, as by thismeans the brace is held in position to render chiefly a lateralspringing motion of its 'curved sides when weight is placed upon thebed-that is to say, the pressing dow/irak the curved sides of the bracesdiverge laterally, as indicated by the dotted lines, instead of bendingchiefly up or down, and thus ex-y ercise a more even and continuedexertion on the springs to hold them to place and With less danger ofcausing hu mpy and uneven places in the bed than Would be possible Withthe springs so arranged that the spring of the braces B would act eitherup or down, besides avoiding uncertain or erratic action of the bracesthat would cause noise from interference thereof with the interior coilsof the springs or with the surface of the structure.

Having thus fully described my invention, What I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. In combination with a spiral-spring bedbottom,braces havingoutwardly-curved sides connected to and passing diagonally from onesurface to the other so that vertical compression of the springs willcause the curved sides .of the braces to diverge, substantially as andfor the purpose set forth.

2. In combination with a spiral-spring bedbottom, lateral braces havingoutwardly curved sides, said braces connected to and passing from onesurface of the bed-bottom diagonally so that vertical compression of thesprings Will cause the curved sides of the braces to diverge, and spiralsprings having their end coils prolonged to extend across the surfaceof, and be secured to the end coils of adjacent springs to form surfacebraces over said adjacent springs, substantially as and for the purposeset forth.

FRANCIS KARR.

In presence otL ITHIEL J. CILLEY, WALTER E. MOORE.

